Steam globe-valve



(No Model) N. '0. LOGKE.

STEAM GLOBE VALVE. No. 256,109 Patented Apr. 4,1882.

I C B e I WITJV'ESSES I IJV'V'EJV'TOR M 6 25 %w/% o%. 5277i .Attorney UNITED STATES ATENT OFFICE.

NATHANIEL O. LOOKE, OF SALEM, MASSACHUSETTS.

STEAM G LOBE-VALVE.

SPECIFICATION formingpart of Letters Patent No, 256,109, dated April 4, 1882.

Application filed December 10, 1881. (N0 model.)

To all whom it may concern:

Be it known that I, NATHANIEL O. LOCKE, a citizen of the United States, residing at Salem, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Steam Globe-Valves, of which the following is a specification.

My invention relates to globe-valves for steam in which a packing of soft metallic alloy is used to close upon the valve-seat.

Heretofore pa ekiu gs of soft metallic alloy, being exposed to the direct action of the current of steam passing through the valve, have been soon cutaway and destroyed.

The object of my invention is to provide means whereby a soft metallic alloy used as apacking for steam-valves shall be protected from the cutting action of the steam and rendered durable. I attain this object by the mechanism illustrated in the accompanying drawing, which represents a globe-valve embodying my improvement.

A is the body of the valve. B is the inlet. G is the outlet. 0 is the valve-opening through partition 6 e, which divides the cavity of body B into two chambers. Raised bead 1), around opening 0, is the valve-seat.

attached to the lower end of stem S in the usual manner, turning upon it as upon aswivel, and being free to adjust itself to the valveseat in closing. A seat-ring, R, of soft metallic al- The disk D is 10y, is pressed, or preferably cast, into a groove in the face of valve-disk D. Just within packing-ring R, and from the center of valve-disk D, extends a central portion, 0, adapted to fit the valve-opening O, and which, in shutting the valve, will always guide the packing-ring R to its place on seat I). Now, when steam is admitted at inletB and passes up through opening 0, the valve being more or less open, the current of steam, first coming in contact with depending central portion, 0, is deflected or thrown outward beyond packing-ring R and againstthe harder metal of the valve, and thus the soft metallic packing is shielded from the destructive action of the steam and rendered durable. I

I do not claim as new either the employment of the soft metallic packing or the depending central portion, c, when used separately.

. l/Vhat I claim as my invention, and desire to secure by Letters Patent, is-

Ina globe-valve having a raised seat, the valve-disk D, provided with a depending central portion, 0 and with a soft metallic ring, R, which ring is adapted to close upon the raised seat, substantially as set forth.

NATHANIEL o. LOCKE.

Witnesses:

GHAs. W. PALFRAY, THOMAS H. LAYTON. 

